In dark forces II level 1, there's the door where you have to activate a switch to open it, and beyond the door is a hollow abyss and you can see another platform with an enemy there, but I can't jump across to it. This is also the place where you can jump down to a lower level and going up a lift to access a secret area. Well, I read the walkthroughs and they all say there's some kinda switch to call an elevator... or a red control room... but god I see nothing like that. I just don't know how to proceed. Please help, thanks in advance!